I've been a Final Cut user since its first release, and it's great. But when I got my MacBook Pro I decided to quit cold turkey and learn Premiere Pro, for the simple reason that its integration with After Effects stands to create some kind of Voltron-like super robot of editing and effects capability. I haven't been sorry—and now I'll be able to enjoy the Production Studio goodness Macside.
I'm filing this under The Guide because a seamless path between NLE and AE is a big part of the workflow. FCP users will either require Automatic Duck or some serious time on their hands (I've done both myself).
Way to go Adobe. Welcome back where you belong Premiere!